Street-sweeper



(No Model.) v 2 sheets-sheet 1.

- M. CARRIER.

STREET SWBBPER.

10.574,350.v A PatentedJan. 5,1897.

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2 Sheets-Sheet 2.

M. CARRIER. STREET SWEBPBR.

(No' Model.)

'wAsHmmuu n n brush mechanism supporting frame.

UNITED STATES PATENT OFFICE.

MILO CARRIER, OF ST,h PAUL, MINNESOTA.

STREET-SWEEPER.

SPECIFICATION forming part of Letters Patent No. 574,850, dated January5, 1897.

Application tiled September 2 l, 1895. Serial No. 563,188. (No model.)

T0 all whom it may concer-n:

Be it known that I, MILO CARRIER, residing at Minneapolis, in the countyof Hennepin and State of Minnesota, have made certain new and usefulImprovements in Street- Sweepers, of which the following is aspeciiication.

This invention relates to street-sweeping machines; and it consists inthe construction, combination, and arrangement of parts, as hereinaftershown and described, and specifically pointed out in the claims.

In the drawings, Figure l is a side elevation with parts removed forclearness of illustration. Fig. 2 is aside elevation of the brushmechanism detached. Fig. 3 is a cross-sectional view of the brushmechanism. Fig. 4 is a longitudinal sectional elevation of the brushmechanism. Fig. 5 isa detached sectional detail of one of the sides ofthe depending adjustable dust guards or aprons detached. Fig. 6 isa planview of the machine complete. Fig. 7 is a detached plan view of the Fig.8 is a side elevation, and Fig. 9 is a plan view, of a portion of thebrush mechanism, illustrating the manner of arranging the guardapron.Fig. 10 is an enlarged side elevation, and Fig. 1l is an enlargedsectional front elevation,of one of the hangers of the smalleradjustable brush, illustrating more fully the construction of theadjusting mechanism.

A' is a platform or fralne mounted upon wheels A2 A3 and carrying amot-or B, preferably of a hydrocarbon type, by which motion may beimparted to the moving parts.

Suspended beneath the framework A', preferably just in rear of forwardwheels A2, is an oblong frame D', having two cylindrical brushes D2 D3journaled therein and connected by gearing D4 D5 D6 D7, so that theyboth revolve inward toward each other, as shown.

The motion is imparted to the pulley a' on shaft a2 of the brush D2 by abelt a3 from a pulley a4 on a counter-shaft E', the latter in turndriven by a system of belts, as shown, from the motor B.

The frame D' is supported from the frame- Work A' by side frames F F2,running in brackets F3 F4 and adapted to be adjusted perpendicularly byraclr-and-pinion adjustments F5 FG, as shown, to regulate the positionof the brushes.

The journals b' b2 of the shaft of the brushcylinder D3 are supported inboxes b3 b4, which are adjustable perpendicularly,so as to elevate anddepress the smaller brush independently of the larger brush, as moreclearly shown in Figs. l0 and ll, whichv represent enlarged detail viewsof this adjusting mechanism.

Supported through the platform A' and fitting by its lower rim insidethe frame D'is a hood G', which is converged and leads off to one sideinto the lower or inlet side of a suction-fan G2, as shown, so that allthe material brushed up by the brushes will be drawn upward by the fan.

The outlet of the fan leads over into the inlet of the centrifugal orvacuum dust-collector II', while the discharge I-I2 from thedustcollector leads into an elevator H3, from whence it is conveyedaway, as into a receptacle K, attached to the rear of the machine.

The hood G is stationary, while the fra-me D' is adjustableperpendicularly independently of it. Y

IVithin the hood G', above the cylindrical brushes D2 D3, are curvedcatch-plates d d2, partially covering the cylindrical brushes andsupported from the frame D' by small bars d3 di, as shown in Figs. 3 and4, so as to be adjusted therewith to retain their same relative positionto the brushes. These plates d' cl2 serve as guards to the brushes tocatch the material thrown up by the brushes and prevent it from beingcarried around by them and thrown out from the other side, but retainingit within the iniiuence of the upward draft of the suction-fan. Thesmaller cylindrical brush is made to revolve at a greater speed than thelarger brush, so that it will catch and throw upward inside the hood allthe material swept back by the larger brush, thereby gathering andelevating all the material and without creating dust or iiyingfragments.

The material discharged from the suctionfan by passing into thedust-collector is completely separated from the air4 and is dischargedinto the elevator and thus conveyed away, thereby avoiding the creationof any dust upon the street.

IOO

The arrangement oi' the oppositely-working brushes is au importantfeature of my in Ven tion, as without this arrangement it is notpossible to avoid making very annoying clouds of dust, especially inswcepin g asphaltum pavements.

The elevator may be arranged at One side, if preferred, to load into awagon alongside instead of in the rear of the machine.

A guard-apron )I will be attached to the f rame D and dependingtherefrom and made adjustable to close the gap between the lower edge ofthe frame and the surface being acted upon to still further confine theair and increase the force of the suetion-fan. This guard-apron consistsof two flat plates M, parallel with and lying close to the ends of theframe D, and will be proy'ided with slots for the passage of the shaftsof the brushes, the slots being' elongated perpendicularly to providefor the adjustment and connected across their forward ends by aninclined cross-plate M', as shown.

Having thus described. my invention, what I claim as new isl. In astreet-sweeper, a platform mounted upon wheels, a stationary hood andwindtrunk supported by said platform and through which artificialair-currents are caused to pass, a frame suspended from said platform,and inclosing the open mouth of said hood and adjustable with relationto said platform, and two oppositely revolving cylindrical brushesjournaled to said frame within the mouth of said wind-trunk, means forrevolving one of said brushes at a greater speed than the other, andmeans for adjusting said 1norerapidly-revolving brush independently ofits supporting-frame, substantially as and for the purpose set forth.

2. In a street-sweeper, aplatform mounted upon wheels, a frame suspendedadjnstably beneath said platform, a stationary hood and wind-trunksupported by said platform and inelosed by said frame, and through whichartificial aircurrents are caused t0 pass, and oppositely-actuatedcylindrical brushes supported by said adjustable frame beneath the openmouth of said wind-trunk, substantially as and for the purpose setforth.

In a street-sweeper, a platform mounted upon wheels, a frame supportingoppositelyrevolving cylindrical brushes and suspended from said platformand adapted to be adjusted perpendicularly with relation thereto, astationaryhood and wind-trunk above said frame and brushes, and throughwhich artificial aircurrents are caused to pass, guards supported fromsaid adjustable frame and depending from the sides thereof and yieldableperpendieularly with relation to said frame, to cover the space betweenthe lower surface of said frame and the pavement being swept, to preventthe escape of dust, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit- IIQSSQS.

MIL() CARRIER. In presence of- C. N. WOODWARD, WM. A. PETERSON.

